<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <title>盒子阴影</title>
    <style>
      div {
        width: 200px;
        height: 200px;
        background-color: pink;
        margin: 100px auto;
        /* box-shadow: 10px 10px; */
      }

      /* 原先盒子没有阴影,当鼠标经过盒子就添加阴影效果 */
      div:hover {
        box-shadow: 10px 10px 10px -4px rgba(0, 0, 0, 0.3);
      }

    </style>
  </head>

  <body>
    <div></div>
  </body>
</html>
